Good Afternoon,
Microsoft is currently developing its license for BPEL4WS and it will be publicly available shortly. Please refer to the enclosed FAQ for additional information.
You can also send an email to BPEL@microsoft.com and include "BPEL4WS License" in the subject line. When the license is ready, you will receive a response indicating where you can find the license on the Microsoft website.
Sincerely,
John Evdemon